Senior Mechanical Engineer - Citywide Opportunities

Join gridware as a Senior Research Engineer in Solid Mechanics, where you will lead innovative projects focused on advancing solid mechanics technologies. In this pivotal role, you will collaborate with multidisciplinary teams to develop cutting-edge solutions that address real-world challenges.

At Mechanize, we specialize in developing reinforcement learning (RL) environments that empower AI models to execute real-world tasks efficiently. Our mission is to drive the complete automation of the economy, providing innovative solutions to leading AI laboratories. Discover more about our work at mechanize.work.As a Senior Software Engineer at Mechanize, you will contribute to the creation of RL environments that are pivotal in the field of AI model training. Ideal candidates will have 2-5 years of software engineering experience with proficiency in Python programming. Previous experience in machine learning or AI is not a prerequisite.For insights on our interview process, visit: Interview Process at Mechanize.

Join mechanize as a Senior Software Engineer, where you'll contribute to innovative software solutions that shape the future of technology. In this role, you will lead projects, mentor junior developers, and collaborate with cross-functional teams to deliver high-quality software products. Your expertise will drive architectural decisions and enhance our development processes.

Join Gridware as a Mechanical Research Engineer, where your innovative spirit and engineering expertise will contribute to groundbreaking projects in the energy sector. You will be responsible for conducting research, developing prototypes, and collaborating with a team of skilled engineers to advance our technology solutions.

At Mechanize, we are pioneering the development of Reinforcement Learning (RL) environments tailored to train AI models for real-world applications. Our ambition is to facilitate the complete automation of the economy, partnering with leading AI laboratories. Discover more at mechanize.work.As a Software Engineering Intern at Mechanize, you will play a pivotal role in assisting our team to develop these groundbreaking RL environments. If you have a solid command of Python programming and possess a keen intellect, we would love to hear from you.We are currently seeking interns for Winter 2026, Spring 2026, and Summer 2026.No prior experience in machine learning or AI is necessary.Curious about our interview process? Learn more here: https://www.mechanize.work/how-our-interview-process-works/

Role overview AECOM is hiring a Senior Mechanical Engineer in San Francisco. This role leads project work and collaborates with teams across disciplines. The focus: designing, developing, and implementing mechanical systems that support efficiency and sustainability goals.

ABOUT PAX At PAX, we are dedicated to transforming lives through outstanding consumer experiences. Our commitment to innovation, scientifically-backed quality, and award-winning design has established us as a leader in the industry for nearly two decades. Millions trust our high-performance products, which are crafted for precision, purity, and consistency. Our culture revolves around prioritizing people, making impactful contributions together, and enjoying the journey. We believe that exceptional products, a fulfilling employee experience, and robust operational rhythms are interconnected. PAX has garnered accolades for its brand, culture, and products from esteemed publications, including The New York Times’ Wirecutter, TIME, Fast Company, GQ, Gear Patrol, mg Magazine, and High Times. Furthermore, we are proud to be certified Plastic Negative across all product lines by rePurpose Global, ensuring that we remove twice as much plastic from nature as we use in our products. ROLE OVERVIEW As a Senior Mechanical Engineer reporting to the Director of Mechanical Engineering, you will spearhead the design of innovative, cost-effective, and reliable products that meet delivery schedules. You will also troubleshoot and enhance existing products while collaborating closely with engineering colleagues to devise optimal solutions for complex design, structural, thermal, and battery life challenges. Proficiency in sketching and prototyping new concepts, along with familiarity with engineering best practices, will be essential. You may also guide and oversee the work of junior team members. Our products are celebrated for their exquisite design, high quality, and reliability. Our Mechanical Engineers play a vital role in shaping the architecture and detailed design of all our products, working in tandem with the Hardware team to realize the product vision. This role is pivotal in leading the development of future innovations. Key Responsibilities: Collaborate with cross-functional teams to develop high-quality products that exceed customer expectations. Partner with Industrial Design to evaluate product features for manufacturability and recommend efficient processes and equipment. Lead the development of mechanical product architectures, assemblies/modules, parts, and accessories. Design detailed mechanical components, including complex assemblies and sub-systems. Conduct feasibility studies to ensure designs meet mechanical robustness, scheduling, and cost targets. Oversee both internal and external prototyping efforts. Facilitate design reviews and promote engineering best practices.

ABOUT US:At Astro Mechanica, we are pioneering the future of aerospace technology with a commitment to creating faster and more interconnected travel solutions. Our mission is to democratize high-speed flight, making supersonic travel not only flexible and accessible but also sustainable. We envision a world where rapid, on-demand global mobility is the norm for transporting people and goods. To bring this vision to life, we are fusing our advanced airframe and engine technologies, including our innovative Duality™ propulsion system, with a new operational framework that ensures supersonic transport is as efficient and economical as today’s commercial air travel. In the near term, our focus is on developing adaptable high-speed systems to bridge performance gaps for the United States government.WHO WE ARE:We are a dedicated team of passionate engineers entrenched in the aerospace sector. Our flat organizational structure encourages collaboration among generalists and specialists alike, fostering a culture where innovative ideas flourish. We operate at a rapid pace, driven by a commitment to building transformative technology in a pragmatic and skilled environment.WHO YOU ARE:Astro Mechanica is on the lookout for a seasoned Senior Mechanical Engineer who is ready to take ownership of hardware design from the conceptual phase through to production. The right candidate will possess a deep understanding of how their designs impact surrounding systems and will tackle technical challenges with a first-principles approach. Your contributions will directly influence the configuration and performance of our Duality™ engine.In this position, you will lead the journey of our cutting-edge jet engine and its subsystems from early prototypes to flight qualification, vehicle integration, and actual flight. You will embody the philosophy of testing as you fly.WHAT YOU’LL DO:Conduct design trade studies while considering system-level impacts.Complete detailed designs supported by structural, thermal, and fluid analyses.Lead design reviews and gather feedback from stakeholders.Build prototypes directly, design necessary tooling, and create work instructions.Perform hardware tests and analyze data to confirm compliance with requirements and performance metrics.Efficiently diagnose hardware issues and identify corrective actions.WHAT WE’RE LOOKING FOR:10+ years of hands-on experience with fluid dynamics and mechanical design in aerospace applications.

Role Overview:Take ownership of the complete lifecycle for memory features—from initial research to final production. You will enhance models for extraction, updates, consolidation/forgetting, and conflict resolution. Transform customer challenges into actionable research hypotheses, implement and evaluate innovative ideas from academic papers, and collaborate with Engineering to achieve state-of-the-art latency, reliability, and cost. Additionally, you will develop large-scale evaluation strategies (including offline metrics and online A/B testing) and integrate real-world feedback to continuously elevate quality.Your Responsibilities:Refine and train models focused on memory extraction, updates, consolidation/forgetting, and conflict resolution; iterate based on data analysis and results.Engage with research: swiftly prototype concepts from papers, benchmark against standards, and operationalize successful approaches.Establish large-scale evaluations: create automated relevance, accuracy, and consistency metrics, gold sets, online A/B tests, and user-friendly dashboards.Collaborate with customers to identify pain points, convert them into research hypotheses, and validate solutions through field trials.Work with Engineering for deployment: design APIs and data contracts, plan safe rollouts, and maintain state-of-the-art latency, reliability, and cost across operations.Minimum Qualifications:Proven experience in RAG or information retrieval (retrieval, ranking, and query understanding) for real-world applications.Model training and fine-tuning expertise (LLMs/encoders) with a solid background in experimental design and iterative processes.Proficient in Python, with extensive experience in PyTorch and familiarity with vLLM and modern model serving frameworks.Experience in evaluation of complex vision-and-language tasks (gold sets, offline metrics, online testing).Ability to orchestrate data pipelines for running models in production with low-latency service-level agreements (both batch and streaming).Exceptional communication skills with stakeholders (engineering, product, go-to-market teams, and clients).Preferred Qualifications:Publications in reputable venues such as NeurIPS, ICML, or ACL.

Join Gridware as a Senior Electrical Research Engineer, where you'll play a pivotal role in advancing innovative electrical solutions. We are looking for an expert who is passionate about research and development in electrical engineering. In this role, you'll collaborate with a dynamic team to design, analyze, and optimize electrical systems that will drive our technology forward.

Astranis is revolutionizing satellite communications by creating advanced satellites that operate at high orbits, thereby expanding humanity's capabilities within the solar system. Our satellites deliver dedicated, secure networks to a diverse range of sophisticated clients globally, including large enterprises, sovereign governments, and the US military. With five satellites currently in orbit and a robust pipeline of launches ahead, we are committed to fulfilling over $1 billion in commercial contracts.Astranis stands out as the premier satellite communications partner for clients demanding high standards in uptime, data security, network visibility, and bespoke solutions. Having raised over $750 million from prestigious investors such as Andreessen Horowitz, Blackrock, and Fidelity, our team of 450 engineers and entrepreneurs is dedicated to the design, construction, and operation of our satellites from our expansive 153,000 sq. ft. headquarters in Northern California.Senior Mechanical EngineerAs a Senior Mechanical Engineer at Astranis, you will take complete ownership of various subsystems throughout the lifecycle of our spacecraft. You will collaborate with multiple teams to realize both incremental improvements and the introduction of innovative systems.In addition to your individual contributions, you will also mentor and train junior mechanical engineers, fostering their development on various projects. A strong background in problem-solving, hands-on testing skills, and experience in spacecraft or aerospace engineering are essential for this role.

At Mechanize, we are on a mission to revolutionize the economy through the automation of real-world tasks. We specialize in building reinforcement learning (RL) environments designed to enhance AI models, enabling them to tackle complex challenges. Our innovative solutions are trusted by leading AI laboratories. Discover more about our work at mechanize.work.As a Junior Software Engineer at Mechanize, you will play a key role in developing RL environments that cater to the needs of the top AI labs. This position is ideal for individuals who are nearing graduation or have 0-2 years of experience in software engineering, and possess proficiency in Python programming.Prior experience in machine learning or AI is not a requirement.Curious about our interview process? Learn more about it here.

Join Marathon Fusion as a Senior Mechanical EngineerAt Marathon Fusion, we are pioneering the engineering technologies required to transform fusion science from experimental concepts into operational power plants. While much of the field is focused on developing new fusion devices, our mission centers around creating practical systems that facilitate the large-scale deployment of fusion energy, essential for addressing climate change.Our expertise lies in developing vital technologies for the fuel cycle and plant operations that enable stable isotope production, fuel cycle closure, and advanced blanket systems, which are crucial for energy generation and producing high-value co-products.Founded in 2023, Marathon Fusion is on a mission to build the components and systems required to make fusion a practical, abundant, and reliable energy source for the future.Our CultureWe operate in a dynamic startup environment that demands focus, adaptability, and the ability to prioritize in a rapidly changing landscape. Success here requires exceptional proactive communication, the ability to foster trust among team members, and a commitment to continuous learning and skill development. We place a strong emphasis on self-direction and initiative within our team.About Your RoleAs a Senior Mechanical Engineer on our Lithium Team, you will collaborate with electrical and mechanical engineers, physicists, and scientists to prototype, test, and implement innovative solutions aimed at advancing the fusion fuel cycle. Your hands-on design and testing experience with electromechanical systems will be instrumental in developing and refining a groundbreaking isotope separation device.Your ResponsibilitiesLead the design and enhancement of the isotope separation system, focusing on robust and scalable deployment.Prototype, test, and troubleshoot individual components and integrated systems, working closely with fellow engineers, physicists, and technicians.Develop a deep understanding of key physical processes and utilize experimental data and literature to guide improvements.Thoroughly document experimental outcomes and decisions to inform design iterations and process enhancements.Mentor junior engineers, fostering their technical development and sound engineering judgment.Your QualificationsBachelor's degree or higher in Mechanical or Aerospace Engineering, or a related discipline.A minimum of 5 years of experience in designing, prototyping, and testing electromechanical systems.

Welcome to Planet. We harness the power of space to enhance life on Earth.At Planet, we design, build, and operate the world’s largest constellation of imaging satellites, delivering an unparalleled dataset through our innovative cloud-based platform. This initiative supports a diverse array of industries including commercial, environmental, and humanitarian sectors, positioning us as both a space and data enterprise.Our clients worldwide leverage Planet's data to pioneer new technologies, generate revenue, conduct research, and tackle some of the planet's most pressing challenges.With complete control over hardware design, manufacturing, data processing, and software engineering, our team is an inspiring blend of experts from various fields.We prioritize a people-centric culture and community, continuously evolving to put our team members first as we prepare for growth. Join us at Planet and be part of our mission to transform global perspectives.Planet operates globally, with a flexible working environment that includes remote employees and offices in San Francisco, Washington DC, Germany, Austria, Slovenia, and The Netherlands.About the Role:The Mechanical Engineering team at Planet seeks a skilled Senior Mechanical Engineer to lead the design of critical spacecraft subsystems for our fleet of Earth-imaging satellites. Your role will encompass overseeing spacecraft design initiatives, from subsystem to full spacecraft level. The ideal candidate will be an experienced mechanical designer with a proven track record in leading mechanical subsystem development through all phases, from conceptualization to manufacturing, testing, and flight integration. As a vital member of the Mechanical Engineering team within Planet’s Space Systems division, you will collaborate closely with various teams to drive our agile approach to spacecraft design.This is a full-time position based at our San Francisco headquarters, requiring in-office attendance five days a week.

Join Bright Machines as a Senior Mechanical Engineer, where you will play a pivotal role in designing and developing innovative automated solutions. Your expertise will contribute to our mission of transforming manufacturing through advanced technology.

At Databricks, we are dedicated to empowering data teams to tackle the world's most challenging problems, from detecting security threats to advancing cancer drug development. We achieve this by offering the premier data and AI platform, allowing our customers to concentrate on their mission-critical challenges. The Mosaic AI organization assists companies in developing AI models and systems utilizing their own data, employing technologies that range from training large language models (LLMs) from the ground up to employing advanced retrieval methods for enhanced generation. We pride ourselves on pushing the boundaries of science and operationalizing our innovations. Mosaic AI believes that a company’s AI models hold intrinsic value, akin to any other core intellectual property, and that superior AI models should be accessible to all. Job Overview As a research engineer in the Scaling team, you will stay abreast of the latest advancements in deep learning and pioneer new methodologies that surpass the current state of the art. You will collaborate with a diverse team of researchers and engineers, sharing insights and expertise. Most importantly, you will be passionate about our customers, striving to ensure their success in implementing cutting-edge LLMs and AI systems by translating our scientific knowledge into practical applications. Your Impact Enhance performance through innovative optimization techniques, including kernel fusion, mixed precision, memory layout optimization, tiling strategies, and tensorization tailored for training-specific patterns. Design, implement, and optimize high-performance GPU kernels for training workloads, including attention mechanisms, custom layers, gradient computations, and activation functions, specifically for NVIDIA architectures. Create and implement distributed training frameworks for large language models, incorporating parallelism strategies (data, tensor, pipeline, ZeRO-based) and optimized communication patterns for gradient synchronization and collective operations. Profile, debug, and optimize comprehensive training workflows to pinpoint and resolve performance bottlenecks, utilizing memory optimization techniques such as activation checkpointing, gradient sharding, and mixed precision training.

Join Anthropic as a Research Engineer focusing on Economic Research. In this role, you will leverage your analytical skills to conduct in-depth economic analysis and contribute to innovative projects aimed at enhancing our understanding of economic models and their implications.

The Center for AI Safety (CAIS) is at the forefront of research and advocacy dedicated to addressing the societal-scale challenges posed by artificial intelligence. Our mission is to mitigate the risks associated with AI through innovative technical research, initiatives to foster the field, and strategic policy engagement. Together with our sister organization, the Center for AI Safety Action Fund, we tackle some of the most pressing issues in AI today. In the role of Senior Research Engineer, you will immerse yourself in the dynamic intersection of pioneering machine learning research and dependable engineering practices. You will own research projects from inception to publication, working autonomously with guidance from an advisor. Your responsibilities include designing and conducting experiments on large language models, developing the necessary tools for large-scale model training and evaluation, and transforming findings into research publications. You will collaborate closely with CAIS researchers, as well as external academic and commercial partners, utilizing our compute cluster for extensive training and evaluation. Your work will cover critical areas such as AI honesty, robustness, transparency, and the investigation of trojan/backdoor behaviors, all aimed at reducing the real-world risks posed by advanced AI systems.

About UsEcho Neurotechnologies is an innovative startup pioneering advancements in the Brain-Computer Interface (BCI) sector. Our goal is to create state-of-the-art hardware and AI solutions that empower individuals with disabilities, enhancing their independence and overall quality of life.Our CultureWe invite you to be a part of a small yet passionate team where your expertise will play a crucial role in shaping our future. Being in an early-stage startup, you will have the chance to make impactful decisions while fostering your own professional growth in a collaborative environment.Position SummaryWe are on the lookout for a Senior Mechanical Engineer who will lead the development of our innovative Echo wearable hardware device. The role entails designing, prototyping, and assessing custom hardware solutions, managing manufacturing vendors, and overseeing design verification processes essential for the development of medical devices.Key ResponsibilitiesDesign and prototype mechanical components and assemblies, utilizing rapid prototyping, machining, and injection molding techniques.Create detailed component and assembly drawings, including tolerance stack-ups and analyses.Identify and liaise with manufacturing vendors for component and assembly production.Conduct simulations and analyses (FEA, thermal, etc.) in collaboration with vendors to inform design choices.Develop custom electromechanical systems for testing and characterization of components and assemblies.Plan and implement design verification activities systematically.